Apparatus for flanging and bending metal plates



June 28 Q1927.

G. HUGHES APPARATUS FOR FLANGING AND BENDING METAL PLATES Filed Jan 9- 1926 //YVE/YTOR 650/?65 Haw/Es.

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" said block can Patented June 28, 1927.

UNITED STATES GEORGE HUGHES, SOUTHAMPTON, ENGLAND.

AZEIARATUS FOR FLANGING AND BENDING METAL PLATES.

This invention relates'to an improved die or block for treating metal plates by bending parts of them to produce flanges, angles, bevels, to increase or reduce angles, produce angle sections and for other like purposes, and more particularly relates to improvements in an heretofore proposed form of apparatus of this nature in which a metal block is provided having a V-shaped recess in its upper face thereby providing a pair of sloping surfaces merging towards each other and each having a part circular channel ineach of which is introduced a substantially semicircular section metal of these two bars providing surfaces against which the metal plate bears when being treated, a wedge-shaped member being interposed between the base of said block and a bearing piece. said wedge-shaped member being adapted to be moved by a traversing screw so as to raise or lower the block, a fixed abutment being provided above the apex of said V-shaped recess. An object ofthis invention is to reduce the friction between the various parts of the apparatus so as to make it more" true and easy in operation.

Accordingto this invention in apparatus of the above type ametal block is provided having on one side, preferably the upper side, a pair of symmetrical sloping surfaces merging towards each other, a frame or bracket within which .said block is relatively movably supported, such .frame or bracket having side members between which be guided and having a suport for a traversing screw carrying a movable member having an extension interposed between said bracket and said block and adapted to move said block within said bracket, a part circular, preferably semi-circular, roller in each said sloping surface, each rol'ler member having one or more projections on the curvedpart of its periphery engaging in recesses formed in the curved section recesses accommodating the curved surfaces of the rollers to keep the roller members in position. 1 The said bracket is of channel s'ection,.its two side limbs having vertical slots to? receive lateral projections on the said block for guiding the block up and down in the bracket. The portion of the bracket bridging-its two side limbs has a sloping upper surface and between this sloping surface and the horizontal base of the block is. interbar, the flat surfaces 7 tion of the bracket, and

v the upper face of Application filed January 29, 1926/ Serial No. 84,652.

posed lower surfaces of which lie evenly against the base of the block and the said upper sloping surface of the bracket respectively. This wedge-like member has at one end a depending lug into which is threaded the traversing screw which is supported for movement in the form of axial rotation only, consequently rotation of this screw will traverse the wedge-like member between the a wedge-like member the upper and block and the bracket with the result that a the block will be raised or lowered according to the direction of rotation of the said screw. This screw is supported at one end in a bearing formed in a lug depending from the centre of one edge of the horizontal porthe other end of the screw isprovidedwith a handle or crank,

or is adapted to receive a tommy bar or other tool. 7

The sloping surfaces which are on the upper face of the block may slope away from each other upwards or downwards according to whether the apparatus is designed to make'acute angles in metal plates or is designed to make the angles in metal plates more obtuse. The metal plate to be. treated is interposed between the upper surface 'of the block and a fixed abutment. i

The invention will'be more clearlyv understood by reference to the accompanying sheet of drawings, wherein Fig.1 is an outside elevation of an apparatus for bending, flanging or forming into V section, metal plates, the drawing showing a treated metalplate in position.

Fig. 2 is a section of Fig. 1.

Fig. 3 is asectional view of the block and rollers intended for producing more acute angles in metal plates.

Fig. 4 is a sectional view of the block and rollers intended for reducing' the acuteness. or to make more obtuse the angles of metal plates.

Fig. 5 is an end view of the bracket accommodating the block.

Referring to the drawings, the metal bracket 1 is secured rigidly to a suitable horizontal base 2 and has a sloping upper surface 3 upon which rests the lower face of movable wedge-like metal member 4 which is horizontal. Upon the upper face of this wedge-like member rests a metal block 5 which has a rod 6 passing through it and engaging in slots 7 in the side limbs 8 of the bracket 1 which is open at both ends. The upper face of this block 5 is formed with synnnetrIcal sloping surfaces 14 diverging upwards away from each other (Figs. 1, 2 and 3) or downwards away from each other (Fig. 4:). The angular relationship of these sloping surfaces 1 1 determines the angle to which the metal plate 9 can be bent.

, Along each slopingsurface 14 is a semicircular or nearly sen'ii-circular recess 10 accommodating a correspondingly radiused half or nearly half section roller 11, each of which has one or more radial projections 12 engaging in transverse grooves 12 in the recesses 10 to retain the rollers in position and to limit their partial rotation in the recesses .10. The metal plate 9 to be treated is interposed between the block 5 and a fixed abutment 13 aligned with the neeting point of the sloping surfaces 1 1, and the flange or angle is given to the plate by forcing the block 5 upwards towards the fixed abutment 13. This movement of the block 5 is obtained by moving the wedge section member at between the bracket 1 and the block 5 by rotating a screwed rod 15 on which is threaded a depending lug 16 of the wedge member 4. This screwed rod cannot move in an axial direction and is supported at one end for rotation in a lug 17 depending from the narrower edge of the horizontal portion of the bracket 1, the end of the screwed rod having a head or abutment 18 engaging the rear face of the lug 17 to prevent the screwed rod from falling out. The other end of the rod 15 has a suitable turning device 19.

In Fig. 4 the block 5 is shown with downwardly and outwardly sloping surfaces 1 1, the rollers 11 are positioned adjacent the apex produced thereby and the abutment 13 is appreciably wider. This arrangement enables an angle in a plate to be made more obtuse.

By means of this invention there is only a small frictional resistance when the apparatus is operated because the block 5 only engages two faces for guiding purposes and the rollers 11 can have a very heavy pressure or load applied to them without risk of breaking or straining any part because the whole load is distributed over their curved surfaces and their positioning means (the projections 12 and groove 12) do not receive much of the load.

I claim 1. In apparatus of the type specified for forming or modifying angles in metal plates a metal block, part circular section rollers in correspondingly radiused recesses in said block, the metal block being provided with transverse channels with which projections carried by the part circular section rol ers co-operate for positioning the rollers and limiting their axial rotation in said recesses, and a channel section open ended bracket in which said block is supported and guided.

2. Apparatus of the type specified for forming or modifying angles in metal plates, comprising .in combination a metal block having a horizontal base, and a V shaped recess in the upper face, a fixed abutment above the meeting apex of such V shaped recess, part section rollers in corresponding recesses in the sides of said V shaped recess, projections on the peripheries of said rollers engaging in transverse grooves in said recesses, an open ended channel section bracket accommodating said block,- projections on said block engaging in the vertical side limbs of said bracket, a traversing screw supported at one end by said bracket for rotation and provided with turning means at its other end, and a wedge-like member interposed between said block and said bracket and con nected to said screw.

3. Apparatus of the type specified for forming or modifying angles in metal plates comprising in combination a metal block, there being symmetrical sloping planes on the upper face of said block, approximately semi-circular section rollers in correspondingly radiused recesses in the sides of said sloping planes, projections and transverse channels co-operating in the opposing curved surfaces of the said rollers and re cesses for positioning the rollers and limiting their axial rotation in said recesses, a

channel section open ended bracket in which said block is supported and guided, and a threaded rod supported for rotation and so as not to move axially by said bracket, a wedge section member interposed between said bracket and said block, and an extension of said wedge shaped member, the said rod being threaded into said'extension.

4:. Apparatus of the type specified for forming or modifying angles in metal plates, comprising in combination a metal block having a horizontal base, and having an upper surface formed with a V shaped recess, a fixed abutment above the apex of such V shaped recess, part section rollers in corresponding recesses in the sides of said V shaped recess, projections on the peripheries of said rollers engaging in transverse grooves insaid recesses, an open ended channel section bracket accommodating said block, projections on the block engaging in the vertical side limbs of said bracket, a traversing screw supported at one end by said bracket for rotation and provided with turning means at its other end, and a wedgelike member interposed between said block and said bracket and connected to said screw.

5. Apparatus of the type specified for formingror modifying angles in metal plates, comprising in combination a metal block having a horizontal base and having an upper surface formed with symmetrical sloping planes, a fixed abutment above the meeting point of such sloping surfaces, part section rollers in corresponding recesses 1n said sloping surfaces, projections on the peripheries of said rollers engaging in transverse grooves in said recesses, an open ended channel section bracket accommodating said block, the side limbs 01 said bracket receiving projections at the sides of said block, a traversing screw supported at one end by said bracket for rotation and provided with turning means at its other end, and a wedgelike member interposed between said block and said bracket and connected to said screw.

6. Apparatus of the type' specified for forming or modifying angles in metal plates, comprising in combination ametal block having a horizontal base and having an upper surface formed with symmetrical upwardly and outwardly sloping planes, a fixed abutment above the meeting point of such sloping planes, part section rollers in corresponding recesses in said sloping planes, projections on the peripheries of said rollers engaging in transverse grooves in said recesses, an open ended channel section bracket accommodating said block, vertical slots in the side limbs of said bracket receiving projections at the sides of said block, a traversing screw supported at one end by said bracket for rotation and provided with turning means at its other end, and a wedge-like member interposed between said block and said bracket and connected to said screw.

7 Apparatus of the type specified for forming or modifying angles in metal plates comprising incombination a metal block,

there being symmetrical upwardly and outthreaded rod supported for rotation and so as not to move axially by said bracket, a wedge section member interposed between said bracket and said block, an extension of said wedge section member, said rod being threaded into said extension.

GEORGE HUGHES. 

